Dear Friend,
When you hire a person as a retainer and pay him a monthly retainership fee, you are not employing him on a regular basis. He is being paid a fee so that you have the right to ask him to do a job (jobs as per the agreement with him) as and when the requirement arises. Normally, a retainership agreement has two types of payments - one retainership fee and the other visitation charges on a daily, weekly, or monthly basis.
As for the issue of 240 days of service, it is an altogether different proposition. If you employ a person on regular wages directly, and he completes 240 days of service, then he would be deemed to have completed one year of regular service. In such a situation, the provisions of the ID Act 1947 for retrenchment will be attracted when you want to discontinue his employment.
I am a retainer for three firms presently. I receive a monthly retainership fee and visitation charges on a daily basis when the firms call me to do work for them.
P. K. Misra